fix(nim/module): fix default tooltip for Chat section

provide the default "Chat" name for the personal chat

src/app/modules/main/module.nim

@@ -201,7 +201,7 @@ proc createChannelGroupItem[T](self: Module[T], c: ChannelGroupDto): SectionItem
   result = initItem(
     c.id,
     if isCommunity: SectionType.Community else: SectionType.Chat,
-    c.name,
+    if isCommunity: c.name else: "Chat",
     c.admin,
     c.description,
     c.introMessage,